Reciprocating pump



J. D. KELLER.

RECIPROCATING PUMP.

APPLICATION FILED MAYH, 1921.

Patented Feb. 28, 1922.

Inventor .fo/zn D.Keller zen of the United States,

. ing application entitled Pum with which the JOHN D. KELLER, OFSACRAMENTO, CALIFORNI OFFICE.-

REGIPROCATIN G PUMP.

To all whom it may concern:

Be it known that JOHN D. KELLER, a citiresiding at Sacra- Sacramento andof California, has invented new and Improvements in Reciprocating mento,in the county of State useful Pumps, of which the following is aspecifi- I cation.

, This invention relates to a reciprocatin pump of the class describedin my co-pen bearin Serial ctober' 19, 1920.

It is a principal object of the present invention to rovide areciprocating pump especially adiipted for use in deep wells and whichoperates a minimum number of movo. 417,997, and filed ing partstraveling through a short stroke I to produce a maximum performance ofthe .pump.

The present invention contemplates the use of a pump cylinder adapted tobe longitudinally positioned within the lgwer end of a well casing, saidcylinder carryin pum chambers and passage ways throng whic water may beforced to circulate by a plurality of simultaneously moving pistons.

The invention is illustrated by way of example in the accompanyingdrawings in which.

Fig. 1 is a fragmentary view in vertical section, showing theapplication of my invention to a dee well casing. Fig. 2 is ane argedfragmentar view in central vertical section showing t e pump presentinvention is concerned.

Fig. 3 is a viewv in transverse section through the pump as seen on theline 33,

i 2. Fig. 4 is a view in transverse section throughthe pump as seen ontheline 4 4 of Fig. 2.

Referring more particularly to the drawing, 10 indicates a well easinginto the lower end of which a pump structure 11 is lowered. Thisstructure comprises an outer cylindrical casing 12 connected atintervals throughout its length by spiders 13, which members carrycylinder head 14. Secured to the opposite sides of the cylinder headsare piston cylinders 15. As shown in F1g.- 2 of the drawings, there arethree of these cylinders indicated as A, B, and C. The upper end ofcylinder A is closed by a head 16 through which a piston rod 17reciprocates. This Specification of Letters Patent. Application filedMay 11, 1921.

\shaft 17. Th g celves the lower end ofa .through which the piston thecylinder pistons.

spiders Serial No. 468,600.

head is designed to form water passage ways 18 and 19 1n communicationwith valve open ngs 20 and 21 respectively. The gravity operated valves22 and 23 are mounted over these openings and alternatively seat thereonas the ,pump operates. The openings 20 are formed through a valve plate24 which is secured to the member 16 and forms an additional bearing forthe e upper end of this plate repump casing 25, rod 17 extends.

he various piston heads 14 are formed with packing glands 26 throughwhich the rod 17 passes to, receive the lower piston 27. This piston ismounted within the cylinder C. A similalri3 piston 28 is mounted within17, while a piston 29 is mounted within the cylinder A and connectedwith said rod. In order to facilitate-in the removal of the pistons andthe dismantling of the the pistonrod 17 terminates within t e upperpiston 29, and supplemental rods 17 are successivel connected with theother his also makes it ossible to readily increase the'capacity o theump by adding additional units thereto. ll of these piston connectionsare fixed by lock nuts 30. The lower end of cylinder C is fitted with acylinderhead 31, which also forms a part of a valve caslng through whichliquid may be drawn into the ump structure. This lower casing is formedwith separate chambers 32 and 33, and induction ports 34 and35'respectively. These ports are alternately closed byvalve members 36and 37.

By examining the structure disclosed in the drawings, it will be seenthat the upper cylinder head 16, the lower cylinder head 31, theintermediate heads 14, the casing lengths 12, and the piston cylinders,as well as their rods, are assembled to form a pump of desired capacityand are held in their assembled position by stay rods 38. These rodsextend down through the casings 12 and are secured to the structure ofthe upper cylinder head 16 and lower cylinder head 31.

By reference to Figs. 3 and 4 it will be noted that the annular passageformed be tween the piston cylinders 15 and the outer casing 13 aredivided into two compartments 39 and 40. These com artments are dividedlengthwise by the spi ers 13. Each of the and connected with the rod isfitted witha pair of circular ports Patented Feb. 28, 1922. p

41 through which communication may be established between the variouscylinders and the well casing. Sets of cylinder ports 42 and 43 areformed at the opposite end of the piston cylinders 15 and upon opposltesides of the cylinder.

The operation of the present invention is as follows:

Assuming, for example, that the piston rod 17 is on its downward stroke,any liquid within the various cylinders will be forced outwardly throughthe lower cylinder ports 42 and into the compartments 39 between thecylinders and the casing. This action will close the lower valve member37, preventing downward movement of the liquid and will thus force itupwardly through the series of compartments 39 to pass out through thevalve opening 21 as the valve member 23 is lifted. \Vhen the lower endof the piston stroke has been reached, suitable mechanism will reversethe direction of the movement of-the piston rod 17 and will cause theliquid which has been previously been drawn in from the well, throughvalve opening 34, the vertical passage ways 40 and the ports 43 to beforced out through ports 43. This liquid will then travel upwardly,lifting the valve member 22 and passing out through the well casing, atthe same time closing the valve 36. Simultaneously with this action, thepistons will exert a suction stroke to draw liquid in through thecylinders through ports 42 and the valve opening 35. It will thus beevident that alternate reciprocation of the pistons will produce acontinuous pumping action.

VVhileI have shown the preferred form of my invention as now known tome, it will be understood that various changes may be made in theconstruction, combination and arrangement of the parts by those skilledin the art without departing from the spirit of theinvention as claimed.

What I claim is:

1. In combination with a. well casing, a pump adapted to be disposed inan operative position therein, said pump comprising a plurality ofcylindrical casing sections substantially fitting within the well casingand disposed in longitudinal alignmentyintermediate spiders between thevarious sections; cylinder heads formed by the center.

in longitudinal alignment; packing glandsformed by the center of saidpump heads; a piston rod slidable through said glands; a pistonwithineach of said cylinders and secured to the rod; vertical partitionwalls dis osed diametrically opposite each other an dividing the spacebetween the cylinders and the easing into two vertical passa e ways;ports at the tops and bottoms of tie cylinders and on opposite sidesthereof to separately communicate with the passageways; valve casingsmounted upon the outer ends of the end cylinders, said casings beingformed with two compartments, a-compartment of each casing beingcomplementary to the longitudinal passage-ways between the cylinders andtheir casings; a valve in each of said compartments adapted toalternately open as the pistons are reciprocated; and means foradjustably holding the various cylinders and casings in their assembledpositions.

2. In combination with a well casing of a pumping apparatus adapted tobe disposed in an operative position adjacent the bottom of the well,the said apparatus comprising a cylindrical exterior casing having anexterior diameter slightly smaller than the inside diameter of the wellcasing, the said exterior casing formed of a plurality of sectionshaving transverse spiders connecting the same, head members enclosingeach of the ends of the pump casing, annular shoulders formed on thehead members and the spider members and'being materially less indiameter than the exterior casing, pump cylinders sections disposedbetween the spiders thereby forming a plurality of aligned pumpcylinders, the said cylinder sections secured to and aligned by theannular shoulders of the spiders and the heads thus forming a chamberbetween the cylinder and the casing, pistons reciprocal in the cylindersand a sectional piston rod connecting the pistons and extending upwardlythrough the Well, diametrically opposite and longitudinally extendingwebs dividing the annular chamber formed between the pump cylinder andthe pump casing, a pair of flap valves in each head, one pair being incommunication with the other, inlet and discharge apertures formed inopposite ends of the cylinders and each communicating with differenthead valves, and stay rods and nuts extending longitudinally of theapparatus and uniting and securing the various sections together.

JOHN D. KELLER.

